Here’s the thread where you get to discuss the merits of your versus ideas with other nerds like yourself. Heads up, if you’re someone who wants to vent about how you hate DB and versus shows, this isn’t the thread for you.
I’ll start off by sharing my ten most wanted. I’ll elaborate on why I want them if anyone asks.

-Azula (Avatar: TLA) vs. Juri Han (Street Fighter)

-The Warden (Superjail) vs. Black Hat (Villainous)

-Cuphead vs. Peacock (Skullgirls)

-Ahsoka Tano (Star Wars) vs. Pearl (Steven Universe)

-Cereal Mascot Battle Royale

-Little Mac (Punch Out) vs. Ippo Makunoichi (Hajime no Ippo)

-Apep/Apophis (Egyptian Mythology) vs. Jörmungandr (Norse Mythology)

-Seras Victoria (Hellsing) vs. Sypha Belnades (Netflix Castlevania)

-Beetlejuice vs. Grim (Grim Adventures of Billy & Mandy)

-Senator Armstrong (Metal Gear) vs. President Funny Valentine (JoJo’s Bizarre Adventures)

Edit: Made a bunch of adjustments to my list now.

Bill Cypher vs uncle grandpa
Both are basically gods need I say more? And mentally they are opposites bill is evil and only cares for himself while uncle grandpa just wants to help his children (evevyone) have fun and be happy or solve their problems.

Hanzo (Overwatch) vs Hawkeye (Marvel)

Explain please

Well, Bill is actually confirmed to be fighting Discord from MLP

Naruto Uzumaki vs Monkey D. Luffy
Issei Hyoudou vs Shido Itsuka
Marines (One Piece) vs Straw Hat Pirates
Monkey D. Luffy vs Sakazuki (Akainu)
Natsu Dragneel vs Portgas D. Ace
Mikasa Ackerman vs Levi (Attack on Titan)
Rias Gremory vs Tohka Yatogami
Son Goku vs Saitama (no biased answers)
Omni-Man vs Superman (DC Extended Universe)

Trying to think of some more challenges as well.

Wait mlp as in my little pony?

Delta Squad vs Bad Batch.

Yeah, Death Battle held two champions polls where fans got to pick two matchups for the latest season. One a 3D fight and the other a 2D fight. The winner of the 2D poll was Discord (MLP: FIM) vs Bill Cipher (Gravity Falls).

In case you’re wondering the winner of the 3D poll was Alex Mercer (Prototype) vs. Cole McGrath (Infamous)

Actually, I think Bill wins that contest. Uncle Grandpa lacks intelligence, while Bill has a huge amount of ruthless powers. I've seen the series, so I know how strong he is.

Well, both are bow users that have many different kinds of arrows. I suppose Hawkeye has gone up against way stronger foes, tho.

I thought you meant as in the makers both dicided their characters would fight now I'm sad... But still cool

Also, I think for an April Fools episode, I wanted Thomas the Tank engine vs Chuggington. I honestly think it’s the stupidest thing I ever did, but I submitted it to them.

How would they fight though?

Velvet Reindeer (Them's Fightin' Herds) vs. Kula Diamond (King of Fighters)