Starc did not open the bowling in India’s second innings of the World Test Championship final, with Scott Boland instead handed the new Dukes ball.
Boland then further pushed his case for selection in the 209-run win, taking 3-46 and removing Virat Kohli on Sunday’s final morning to kill off India’s hopes of chasing down 444.
The innings marked only the second time Starc has bowled first change since 2015, and came after the left-armer was taken off briefly after his first two overs in the first innings.
But Cummins indicated the move was largely because Australia believe the Dukes ball does not swing early, and was no indictment on Starc’s form.
“I don’t think I’d look too much into that,” Cummins said.
“We did that last Ashes series as well. We chop and change the opening bowlers depending on gut feel.
“The ball moves a little bit differently to Kookaburra. It might swing a bit more after a few overs rather than the first couple.
“In terms of Scotty, I’m sure he’ll play a huge role in the Ashes but we’ll see how it plays out.”
Cummins’ comments come as selectors turn their focus towards their first against England at Edgbaston on Friday.
Josh Hazlewood bowled two separate spells at The Oval before and after play on Sunday, and is expected to be fit for the match.
That will create a squeeze between Hazlewood, Boland and Starc to join Cummins in the attack, with Australia likely to rotate throughout the series.
Starc endured the most expensive Test match of his career by going at 5.34 an over against India at The Oval, where the square is wide and the ball runs quick to the boundary.
But he also claimed the key wicket of Virat Kohli with a rising short ball in the first innings, and took 2-77 in the second.
“I thought Starcy bowled well, particularly today,” Cummins said.
“He did a role for us that we know Starcy can do after 80 Test matches.
“He has got a huge tour ahead of him and will play a huge role for us.
“The English side sets up slightly different as well. There are a few more left handers. The wicket is going to be a bit different.
“I’m really happy with where Starcy is.”