I would love to see Super Robot Wars in Smash, I mean, even the OG saga has a cult following in Japan and SRW and Nintendo has a lot of history with a lot of its games being exclusive for years on their consoles. However I always ask myself, would they add a pilot or a mech? The pilot seems easier and there are various popular options like Sanger Zonvolt or Roar who can fight outside their mechs with ease and are iconic, but on the other side is super ROBOT wars, no super pilot wars, so the most recognizable side are the mechs, but there is the "too big" argument, howver I think it can be played around when one of the main features of SRW is their use of "Super Deformed" mechs, which means the og game is already not acurrate to actual sizes so it can be worked around just fine me thinks, in that case my bets would be on the Cybuster, the Dygenguar or the SRX that feels like the most iconic designs; the Huckebein is an option too sure but I guess it is too gundam-facey and might be a problem due that.
...as for whether the cgi would have detracted anywhere near as much as having all of the action be near-imperceptible among the darkness is kind of another matter. though i do think the idea of having the muzzle flashes light up the tunnel was pretty inspired