The Scottish Professional Football League chief executive believes the addition of the Glasgow club will drive interest in the Ladbrokes Premiership.
Doncaster had warned clubs in 2012 of the financial consequences of Rangers starting their post-liquidation journey in the Third Division and he welcomed their Ladbrokes Championship success, which they clinched with a 1-0 victory over Dumbarton on Tuesday.
“It’s great news for Rangers fans all over the world and, I think, good news for Scottish football as well,” Doncaster told Sky Sports News HQ.
“We’ve got an appetiser in 10 days’ time with the Scottish Cup semi-final between Celtic and Rangers, but we’ve got four pretty big main courses to look forward to next year.
“There are also games against Hearts and Aberdeen, which are big games in their own right, and clearly that’s going to drive eyeballs, that’s going to drive interest, and that should translate into more commercial revenues for the benefit of all 42 clubs.
“When you travel overseas and talk to leagues across the world, the games between Rangers and Celtic are global events and they are games other leagues will talk about all over the world.
“So to have those games back, to have the increased level of interest, that can only help in marketing the whole game worldwide.”