Who do you want to see in the 3rd Legendary Hero banner?

Summer Corrin - Blarblade Flier? Yes please.

Anyone else, I don't care about, except the new unit that's supposed to be Earth?

Putting Leo on a banner after he was basically outclassed by AU!Eirika is pretty much saying "Good luck with pulling red units" and no one's really gonna bother.

I have Minerva, but her IV's aren't the greatest, and I don't really use her.

Innes was in the last Legendary B8% banner, along with Elise and...someone else.

Red:

Leo (never got him)
Alm (if Celica had already been introduced as Legendary Hero, so can he)
Mia (or Elincia)

Blue:

Summer Corrin (argh, never got her)
Lute (ditto)

Green:

Brave Ike (yup, we could all use more Steady Breath lol)
Gunnthra (given)
Minerva (I'd personally want her, but I got quite a lot of green fliers already)

Colorless:

Innes
Leon
Performing Olivia

Red:
-Elincia
-Mia
-S Leo

Blue:
-Fjorm
-Linde
-S Corrin

Green:
-Gunnthra
-S Elise
-B Ike

Colorless:
-New Hero
-Takumi
-S Gaius

Yeah, all of it is basically PM1's list except for Linde instead of Delthea, but I agree with his choices. Just an FYI, Innes was in December's Legendary banner.

I don’t think we’re gonna see Halloween or Performing Arts units in the next 2 legendary banners (if they respect the pattern from the first 2). Or maybe I’m just trying not to get my hopes up because I didn’t manage to pull either H!Henry, H!Jakob and PA!Olivia and I really really want them.
Other than that, I’d really love Summer Gaius (for merging), Delthea (I really need a better infantry blue mage) and Dorcas. I don’t care about the other units that come along as long as they aren’t major pity breakers.

Innes was in last legendary banner, and I think they'll only repeat legendary heroes, so he's out. Maybe Takumi instead?

Would be fine with Linde/Delthea and SCorrin for blue. That would also give me a reason to pull from the banner. If I get a spare Fjorm, maybe I can give Atk Def Bond to someone.

Red, I hope for Mia. Still haven't gotten her after being pity broken 5 times on her introductory banner.

Green...no one comes to mind.

Red
- Elincia
- Summer Leo
- Alm

Blue
- Fjorm
-Summer Robin
- Linde

Green
- Gunnthra
- Summer Xander
- Brave Ike

Colorless
- New Hero
- Summer Frederick
- Faye

These are my guesses

Summer Corrin doesn't have the valor skill.l, that's Azura's son whoever his name is.

Everything is assuming well get an Earth Hero!? Why!?

Clearly, we’ll be seeing Laevatein. Just you wait.

I want Summer Robin though, not Corrin. Too low on orbs, gee thanks Micaiah...

Halloween Jakob will not appear in the next 2 banners for sure. These next 2 will be all about the summer siblings. Performing arts characters will probably also be seen alongside Halloween characters, so nothing is going to be on the next 2 banners for them.

Honestly, I want to see what characters are on the banners and then decide what I want to do. As it sits right now, I’m not overly hyped about the third banner, and I have a pity breaker building on the SS banner I want to break before I worry about summoning on the legendary banner.

As far as what I think, I could see them doing this:

Red: Elincia, Leo, Summer Leo
Blue: Fjorm, Summer Corrin, Linde or Olwen
Green: Gunnthra, Summer Tiki, Minerva
Colorless: new hero, Summer Frederick, Takumi

I doubt Dorcas jumps into this banner because he is much newer than Minerva, and she has yet to see some legendary love. Although if Dorcas and Gunnthra were on green, and summer tiki wasn’t in there with them but another top level green unit was, I’d probably pull hard for green. Blue would be good for summer Corrin and Linde or Olwen, but I wouldn’t be fond of red; colorless might be a stretch only because I’d want the new hero or Takumi to fodder him to my Leo for CC. But if Takumi isn’t on colorless, I’d probably wait for the next legendary banner.

A lot of predictions I see have all 4 summer units because summer is next up on the seasonals but so far we have got pairs of two events spread over two banners (Spring/Bridal) so I think we are gonna get Summer and PA over the next two legendary banners. I also do not think that all the legendary heroes will be in every legendary banner, especially if this frequency keeps up, instead I feel they will enter a rotation.
Red:
Y! Tiki
Mia
Eldigan (more likely Elincia/Sanaki but I can hope)

Blue:
PA Shigure
Brave Lucina (we've got all the other braves so far,)
Linde

Green:
Gunnthra
PA Azura
Summer Elise (if pairing gotta double seasonal at some point with it)

Colorless:
Earth Legendary (Loki?)
Summer Gaius
Takumi

Both Leo's are terrible.

Completely agree with those Blue's: Fjorm I want to fodder off Atk/Def Bond to Myrrh; Summer Corrin I want for better IVs/merges; and Linde has been quite high on my hitlist for ages now, yet IS refuses to give us her in a banner.

Give me those 3 together, and I can happily summon purely Blues, with the only possible exception being if they put Laevatein in, at which point I may well have to summon Red as well.

Red
Zelgius - I have one with unusable IVs
Ike - I have a +Def/-Res, but I would rather have +Atk/-Res
Siegbert - If I can't have Xander I'll settle for his son!

Green
Sonya - I simply want to merge the unstoppable ex-witch
Summer Tiki - I never got her, plus she's strong and eye candy at the same time, WHY NOT?
Gunnthra - It is obvious

Blue
Micaiah - I have 8 of her from free orbs and they all suck
Summer Corrin - I agree with everyone else on the reason
Fjorm - Obvious

Grey
Takumi - I just want CC
Performing Olivia - Dancer and a valid dagger user with Poison Dagger
Jaffar - Virtually the best dagger user in the game

I really am just hoping for the summer units because I got ultimately jipped in that banner.