When the Commons Deletion Bot is code complete we'll need to decide a rollout strategy.
We will want to test this in a small capacity (one or two wikis) to make sure everything is working as expected (and that it's actually useful!)
After our initial testing and bugfixing we'll want to release to as many wikis that want it — or could benefit from it — as possible. We will need to decide if this is appropriate to just run on all wikis without their explicit request (opt-out) or if we want a system for wikis to request it to be enabled (opt-in.) Both methods have their pros and cons (wikis being unaware of this useful tool vs. additional spam on talk pages.)
Also: some wikis already have systems to monitor Commons, so we'll want to be open to feedback during this process if there are any high-impact improvements we could make along the way.