I don't think that makes sense. The movie implies Bane's allegiance to Talia. And the whole plan is based on Talia's revenge for the death of R'as.
It's not like Talia slipped in at the last moment and said, "I'm taking credit for all this- "
I don't think you're reading the movie correctly. It's about Talia's revenge against Batman for R'as al Guhl's death. Bane is there because she rescued him from the pit. He allied himself with her because of that. That was the whole point of all the flashbacks.
Deception and misdirection was on Nolan's part- making us think it's Bane, Bane, Bane when the real villain behind it all is Talia. That brings the trilogy full circle. If it's Bane, Bane, Bane- then it really doesn't make sense. R'as never did anything for Bane. He was always allied with Talia. He was in the LEague of Shadows because Talia was the new head. It's all misdirection and deception about Bane. Not his plan, not his revenge, not even his origin.