Alot depends on whether Oblivion is a remake or just a remaster, the original leaker said it was being designed as a remaster but that they were considering delaying the game and making it more of a remake. If it's just a remaster, minor graphics update (ala Mass Effect Legendary Edition), in-game mod store added, etc., I don't see it being even as successful as the original Oblivion release (which we have no official sales number for, most recent number we have is an analyst making an educated guess of 10.5m in 2015, 9 years after release). If however they take their time, remake it with updated gameplay, systems, animations, etc. in addition to a larger and more noticeable graphics update, I'd say that it could potentially be a system seller. There are approximately 50m Skyrim owners (and who knows how many more Skyrim players thanks to Gamepass and PS+) who have never played the earlier Elder Scrolls games like Morrowind and Oblivion, if enough of those Skyrim owners who never played the earlier games become curious to play Oblivion Remake it could definitely be a system seller for Xbox Series. 

Scalebound baby!

Square Enix, Lul.

T-Minus 54 minutes

Scalebound, published by Square Enix and developed by Platinum Games.

Except this time its multiplat and will actually come out.

(And somehow have a tie in with Drakengard and Nier)