Don't think trains can be extended to MYSURU. There are already Platform constraints at MYSURU, further only SBC trains can be extended as there is no way for MYSURU trains to go to YPR/SMVT/BNC. All of them have to come at SBC itself. SBC is already saturated.
Few months before MYSURU MP Pratap Simha tried extending YPR BARMER express train no 14805/6 to MYSURU, however it didn't get extended.