Lego Batman is no longer game pass subscription.

No, the Epic game store is not available on console.

The only suggestion I can think of is to try out Game Pass. The Arkham games are on Game Pass. Some of the Lego games are also on Game Pass, but I think Lego Batman 1 and 2 have already been taken off the service.

https://www.trueachievements.com/n38746/leaving-xbox-game-pass-august-lego-batman-2-the-maw-onrush-joy-ride-turbo

Hi, the season pass for Lego Batman 3 is compatible for both the regular and the deluxe version of the game. Both versions of the game get the same dlc at the same price. So you can purchase the season pass for lego batman 3 if you wish. It will work
with your game.

I remember playing a lot of "Lego" games when I was younger, it's pretty simple and really fun! There are for example: Lego Star Wars or Lego: Batman.

I think they're in the Game Pass.

Which Batman game, there have been quite a few.

Lego Batman?

Batman Arkham Asylum?

Batman Arkham City?

Lego Batman 2?

In my opinion, the Lego Games. They are all fairly similar, but different enough to still be enjoyable. Whether it be Lego Batman, the Lego Movie, Lego Undercover, or Lego Star Wars. All of them have been pretty good, and surprisingly packed with content.
Plus, Microsoft frequently adds some (and takes some off) to Game Pass.