The 21-year-old, who can play in central defence or right-back, joined Rovers in March and after being involved in losses in his first two games - including in his debut against derby rivals Burnley, Keane did not taste defeat in the remaining 11 games.
That sequence of results at the end of the season was not quite enough to propel Gary Bowyer's men into the top six, but Keane has fond memories of his time at Ewood Park.
He will now go back to parent club United, whose managerial situation is in limbo following the sacking of David Moyes last month.
"First things first I'll have to see who gets the United job and then see what happens," Keane told the media after the 4-3 win over Wigan on Saturday.
"If I was coming to the Championship I would definitely consider coming back to Blackburn.
"I've had a great time here and I've seen how good the team is and I seriously think next season they will be pushing for promotion."
Keane struggled to hold down a regular first-team spot at Derby during a spell with the East Midlands club earlier in the campaign but was a regular under Bowyer with Blackburn.
The defender added: "When I first came it was just initially to get a few games but it has ended up being much more than that.
"We've put a great run together lately and it has been a good push for the play-offs. In the end we ran it close, but just not quite close enough."