Summer Banners?

Nothing specific has been confirmed yet, but there are speculations of it being the most favorite heroes based on a voting or something like that, as far as I know.
I guess you can try summoning now if you have at least 4% appearance rate at the current banner, 'cause I don't think it's worth it if you have it lower atm (considering you are f2p).

If speculation is correct, the next gauntlet will be made up of healers, so if you especially want, like, Elise, that's a possibility.

Im guessing that banner wont be out for at least a month from now.