The one I'm looking forward to both for good and bad reasons is the Streatham to Eltham one - I'm still skeptical it will work in that form given it will highly likely run via the very congested A205 which between Brixton Hill & Lee is a pain the backside to navigate and if running via that route, is constrained by the low bridge on Thurlow Park Road. Starting the route at Brixton instead of Streatham would allow it some reliability saving by missing out Christchurch Road but I don't see them amending it so on a more positive note, I decided to think which stops will be served and this is my guess at this stage with a small reason why I think that:
Streatham Station (assuming this is where it will start, it's the most logical place)
Becmead Avenue (for the shops and Odeon cinema)
Streatham Hill Station
Streatham Hill, Telford Avenue (for interchange with the 59 & 137)
A new pair of stops (one in each direction) on the currently unserved section of Christchurch Road
Tulse Hill Hotel for (for Tulse Hill Station with Tulse Hill Station being served towards Streatham due to the gyratory system)
West Dulwich Station
Horniman Museum (for the museum and for the nearby 363 - I did initially pick Wood Lane)
Forest Hill Station/London Road
Stanstead Road/Colfe Road (Forest Hill Fire Station towards Streatham, for interchange with the 122)
Catford & Catford Bridge Stations
Brownhill Road/The Catford Centre (Catford Road/Lewisham Town Hall towards Streatham, for the shops and interchange with other routes)
Baring Road (interchange with the 261 & 273)
Eltham Road/Westhorne Avenue
One of the stops on Eltham High Street presuming it won't terminate at the station