But Cipriani, who has already told this website of his desire to represent the Lions in 2013, is hopeful of an international recall when England interim boss Stuart Lancaster names his Elite Player Squad on Wednesday.
"There's a clause in my contract which would allow me to leave the Rebels if I get picked for England during the 2012 Super Rugby season," Cipriani told the Daily Express.
"I've worked with Stuart Lancaster before and I've got a lot of respect for him.
"I'm encouraged that he's said that players who were previously overlooked or on the fringes are now going to be considered to play for England.
"My dream is to play for my country again. It means everything to me and is the whole reason I started playing rugby."
With first-choice fly-half Toby Flood doubtful for the tournament opener against Scotland on February 4, Cipriani could be a surprise selection in Lancaster's 32-man squad.
And even though the inclusion of the former Wasps playmaker would be a massive shock, Cipriani insists he is now a far better player than when he left London two seasons ago.
"I'm not saying that I am definitely going to be picked but from my point of view I've never been fitter or trained harder and I've never wanted it more," added Cipriani.
"I'm optimistic of getting another chance to play for England and I won't give up hoping, but I know there are no guarantees for anyone. I've got a long-term goal now to be in the England squad for 2012 and to be first-choice No10.
"In the past it was probably easier not to pick me. I'm working now to make sure I front up in those areas."