It won't happen soon. It's a big parcel. And the BRA has it marked for a large retail complex to serve the growing Back Bay and Fenway (as well as the retail refugees off Beacon and Comm Ave)... The BRA would probably prefer a big podium w/ a thin or 33 Arch type tower. But, i'm with you all. After new additions to the wall of 325-400' towers, anything that happens here needs to go very tall.
But any proposals will ignite a political firestorm with the Back Bay community due to shade being cast on the neighborhoods off Newbury Street and Comm Ave (in the spring, late summer, fall winter, etc) in addition to late afternoon shade issues over BPL, South Church, Trinity Church and the Copley Sq green patch.
connect and zoom: look at South Church sitting in its virgin sunny patch, unprotected from the evil developer. That's a nightmare for the BRA if we ever saw one...
https://www.google.com/maps/@42.3455235,-71.0762495,568a,20y,339.55h,42.45t/data=!3m1!1e3
Menino was pressured into signing off on a law that would have put much of the area out of reach for anything over like ~150-200' (if memory serves), that would have included this parcel in the land grab. Luckily, he balked.... Still, the political winds aren't aligned for tall at L&T now, and may never be. You should formally ask the BRA for clarification. However, with all the hotels and condo's going up in the area, the BRA clearly wants this space set aside for future mega-retail first, with consideration for
'tall' a distant second.
3 parcels that immediately shout out for a slender, 925'/Boston supertall are:
1. 111 Huntington
2. 1 Dalton
3. Dalton St. Garage.
An argument can be made for several other parcels in Back Bay to go as tall as 150~180m, but i don't think you'd ever get very far arguing for much more, and still, even those would be longshots for anything over 120m.