There could be Dabangg 3. But Arbaaz said that it'll go on the floors in mid-2018, so don't see why it'll take 1.5 years to release.
There won't be any Aamir movie as he is committed to Mahabharat. Even if not for that, he wouldn't be able to make and release a movie only 13 months after TOH.
There can be an SRK movie. Something with SLB or Don 3.