We Walk, We Cycle, We Vote will probably return for the local elections (we're having a washup meeting to discuss it next month).
In theory, yes, it would be simple to refocus the website to council candidates but don't underestimate the amount of work involved simply in gathering a list and then getting hold of contact details for each candidate in all 32 local authorities.
There were lists published of some (not all) of the candidates for the major parties well ahead of the election this year which made it a bit easier to find them on twitter, facebook etc. (it was still very tricky to get email addresses for a lot of them though). I doubt we'll see similar publicity for council elections, so it's likely to be a question of waiting for the election notices to be published about 6 weeks beforehand and then a concentrated data entry effort to get them recorded and some sort of contact details found for them.
There were efforts to crowdsource this information for these elections but for my purposes they were too little, too late (I did share what I had compiled with the others though)
In general, the more candidates were contacted and the more active their electorate, the more likely they were to respond to the three asks for the Walk Cycle Vote campaign, so getting contact details - and especially social media contact information - is pretty key to making this sort of pledging campaign work. I think that's why we had almost twice the response in Edinburgh as any other region, with South Scotland coming in second, probably because that's where both Suzanne and I are based, hence driving a bit more activity in that region (showing that it doesn't take all that much, especially for the list candidates)
Any volunteers who may have some free time around late March, early April next year and who would like to help collate information, get in touch!