>>55519249Basically, if you design a Pokemon at the same time as it's mega, you risk sorta underdesigning the Pokemon for the sake of having that room to "finish it" in the mega.
Some (but not all) of the Galar gigantamax forms definitely started to feel like this for me at least. Something like Drednaw for example sorta feels like a middle stage.
I think something that people aren't thinking about enough though is like, the design process themselves. the same way flygon didnt get a mega probably applies to a lot of 2 stage lines that dont get third evolutions. The design is simple "finished" already and has reached its logical conclusion. Megas sorta try to go beyond that finished state by breaking some of the visual rules of pokemon a bit. This is why Mega's are not interchangeable with standard evolutions, or why pokemon with 1 or 0 evolutions that got a mega probably were never going to get another mega in the first place.
Since they'd just "finished" the Kalos starters designs, it probably would have been a bad idea to immediately try to expand upon them with megas. Now that the design's have matured, it makes a lot more sense.
As for the question posed by the thread though? It's honestly 50/50, if we have some new assorted starter lineup like PLA, they will undoubtedly get megas, and i'm not sure if they'd give two full sets of starters megas in one game.