Colors are busy promoting the two new shows. No other new show will come before the last week of June (3 weeks after kasam2 for promotions)
IMO Shakti will be the last to end, it served the channel well for a very long time. I think they'll keep one of their old shows a bit longer, either Shakti or Udaan. Udaan can be stretched longer but Shakti is still in Colors good books.
There are two weekday shows in the pipeline, the mythokogical show was reported to be a weekend one (it'll probably replace courtroom) and they have been shooting it since April last year, so no one knows when it'll be ready.
IMO IMMJ and Udaan are next in line, Kesari should go for leap soon. I don't know how Jhansi could turn its performance around. IPL is like survival of the fittest, the good shows don't get affected and the weak shows suffer, so even after IPL number may increase but the gap between Colors shows and SP/Zee will remain big.