I thought it should be out in April-May but I don't see anything about it yet so I was wondering if It got cancelled or they are planning to run it on June ?
No, not to my knowledge. As far as I know, it would take a certain % of consensus to enable this feature, but we are seeing some delay in this consensus to form, but then again I never fully understood how segwit was going to be deployed into the main net. I think 0.12.1 already has segwit but it's just not deployed yet? something like that.
0.12.1 does not include segwit. It includes the soft fork salad of "CSV" which is comprised of BIP 68, BIP 112, and BIP 113. CSV is facing somewhat slow adoption by miners and is a prerequisite for segwit which would probably be 0.12.2.
There are rumors that miners will not activate segwit until Core has coded a HF blocksize increase for them... given Core's lack of desire to do this... it could be a VERY long time before
anything happens. I would be shocked to see any additional capacity before the halving comes and goes.