I understand the Starbucks building on on St John's Road (the one that closed a few months back) is in a poor condition, and may well be demolished completely and replaced with a new but broadly similar-looking building.
In almost-Northcote-Road retail news, Flying Tiger (formerly just known as Tiger - there's already one in Southside) are taking on the old Maplin unit on St John's Road. It's an unusual business, that seems to replicate a small part of the Ikea odds-and-ends area, but a browsable place and probably a good way to draw a little footfall further along the road towards Northcote.
And somewhat further afield, Whole Foods on Lavender Hill are likely to be expanding, taking on the long-closed-down (and, currently, run down and filthy) loan shop that's next door to their current premises.
I'm wondering if the old Carphone Warehouse on the corner of Battersea Rise will be demolished and rebuilt with something on the upper levels. It's closed, and that building (I presume some sort of either bomb site infill, or maybe the consequenc eof some historic realignment of the road junction, akin to the Lavender Hill / Latchmere road realignment) is a bit of an eyesore.
Hopefully our Debenhams is safe in the forthcoming closure round. As a historic department store it's not got the layout the company would really want, but it's busy (indeed a lot busier, as far as I can tell, than the larger and altogether more modern Wandsworth branch) and in a very good catchment. It could do with some work on presentation and range, but it remains an important part of the overall retail picture - and in drawing wider customers to CJ / Northcote / etc. But having two branches within a mile or so is a bit tricky...