There are no plans to bring her back, at least not at the moment.
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The eleventh Doctor will star in The Sarah Jane Adventures along with the third Doctor's companion Jo Grant, apart from that there are no plans to bring any former companions back to Doctor Who.
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It has been established that a Time Lord has 12 regenerations, or 13 bodies. However, both Russell T. Davies and Steven Moffat have openly said that they have no intention to sticking to this limit.
It got cancelled so it's not coming back, not unless another network takes it on.