Like the title says what synergies are you surprised aren’t in game yet.
Miles I’d figure would have a synergy that gives him control of his abilities. This alone would improve him a good bit imo.
Ironman
Ironman family synergy, with IMIW being one of the last Ironman well see in game for a while I’m surprised they didn’t give him one great big synergy sendoff that boosted all the Ironman with some awesome enhanced suit tech upgrade. The one he has already that reduces armor break time or whatever is a serious disservice to RDJ and MCU IM

Iceman
I’m surprised one that extends his coldsnap hasn’t popped up or even one that makes him coldsnap immune lol.
Karnak is slightly more usable with his true strike extension synergy so I figure iceman could do with one. Would take the pressure off of some fights, good little slight improvement.
Rogue
Surprised she didn’t have one that extends the duration of her buff steal refresh mechanic.
Pheonix
Surprised she doesn’t have a taunt synergy with all the taunts kabams throwing around like Oprah when phoenix’s a character that needs it badly.
Who do you all got?