Indiabulls Estate Sector 159: Investment sahi rahega?

Guys, I'm thinking of investing in Indiabulls Estate in Sector 159. What do you think about the area's future development plans? Kya kisi ko pata hai metro expansion ka kuch impact hoga? Also, what's the rental yield potential like? I'm looking for long-term gains, so expected appreciation kitni ho sakti hai? Mujhe advice chahiye, is it a good time to buy now ya wait karna chahiye? Any suggestions?