At this point, Doom, Sonic Mania, Metal Gear HD collection , an EA (not f2p) NHL game, WWE 2K18 Dantes inferno, Bayonetta 1 and 2, Shen Mue, Dead or alive 5 (the real one no f2p trash), Devil May Cry (real one), Marvel vs Capcom 3 or 4 ( we need decent fighting games, SF4 showed us that on screen controls can work ). This is merely a wish list of games that would fit on iOS very well.
I wish Doom would come back to iOS. Would love Quake II but that seems like it'll never happen. Still we might get some surprises at some point, who knows