Mariah Carey and Adele -- Top Colosseum Wish List as Celine Dion Bows Out

Mariah Carey could pull a Britney Spears by taking her kids to Vegas and pulling down a huge paycheck to do shows there -- as Caesars Palace eyes huge new names to put on it's marquee.

TMZ has learned the Colosseum -- where Celine Dion has had a residency for years -- would love to sign soon-to-be single Mariah for a very lucrative weekend engagement. Our sources say the offer that went out was $750k for two shows!

We're told the Colosseum's operator, AEG is targeting a bunch of other heavy hitters too, including ... Adele, Blake Shelton and Miranda Lambert, Prince, and Bruce Springsteen.

Comedians Chris Rock and Chelsea Handler -- who both sell out bigger arenas than the Colosseum which seats about 4,300 -- are also wanted.

We're told this dream list was put together long before Celine's recent announcement she was taking a leave of absence until next spring to be with her ailing husband.