I just had a thought (Odd/Even wave)

So this really isn't a question but in the game we have now Even Speed wave, Odd Attack wave and Odd Res wave and now Xander comes with Odd Def wave? Is it safe to then assume will be getting Odd and Even waves of all 4 stats? I for sure thought that we'd get Even Def wave next so I didn't even think about until now. Was this something that everyone knew and I'm just out of the loop? ^^;