Amendments 1/?:
Spawn vs Ghost Rider goes to 50/50 (Lobo vs Ghost Rider wasn't THAT long ago)
Spawn vs Demi-Fiend goes to don't count on it (there's not a chance we're getting it before Ghost Rider vs Spawn)
Ash vs Yugi goes 50/50 (decently requested, uses big ticket franchises, but I'm struggling to see how you'd choreograph something like this)
Bill vs Discord goes to don't count on it, borderline lol no (it's MLP's only remaining shot at the show, if one exists at all)
Every MLP matchup besides Bill vs Discord goes to lol no, for aforementioned reasons
Cell vs Dark Samus goes to 50/50 (Cell's decently requested, DS is the fan favourite opponent for him, Metroid is more popular than it's been in years thanks to Dread. The big knock against it is that Cell has a million other opponents competing against Dark Samus to fight him)
Meta Knight vs Zero goes to probable
I don't know how controversial this is, but I'll put Doomsday vs 682 in 50/50.
Shulk vs Lightning goes in 50/50, borderline probable (decently requested, lot of history to it, brings in a new verse, I imagine they're well aware of the demand for non-7 Final Fantasy to be represented).
Palpatine vs Xehanort goes to 50/50, borderline probable (would be higher if it weren't essentially bad guy version of Yoda vs Mickey)
Aigis vs Noel goes to 50/50
Yu vs Josuke goes to don't count on it, borderline 50/50
Cervantes vs Spinal goes to 50/50, borderline don't count on it
Kira vs Adachi goes to don't count on it
Chie vs Mako goes to don't count on it, borderline 50/50
Taskmaster vs Deathstroke goes to 50/50 ("Taskmaster" being in Black Widow helps net it a few relevancy points)