Vampire: The Eternal Struggle is another and pretty similar example. It was killed and brought back twice.
The key there was that there was one core group that took on responsibility for rules/errata, OP, maintaining the restricted list and publishing an FAQ. In the case of VTES it was the players org which existed outside the publisher and was doing all that stuff anyway, but it was important that there was one central source that everybody agreed on.
Later on there were expansions published with new cards, and that worked well because there was one canonical source, who were also the people who could approve the new cards for OP, and the cards were rigorously playtested and looked & felt like ‘real’ VTES cards. Having new expansions helped a lot but that’s a hard thing to do right.
One big advantage that Netrunner has that VTES didn’t is Jinteki.net. Getting Jinteki aligned with the things the Board wants to do (initially, restricted lists and errata as required, eventually maybe new card sets) will be a good way to ‘officialize’ and popularize them. Plus, it’s a great tool to maintain interest on its own.
The current resurrection of VTES is a fan-driven operation. They’re licensing the background and adjusting the mechanics to keep WotC happy (removing ‘tap’ and ‘untap’, etc). Netrunner doesn’t seem to have a whole lot of mechanics cross-over with MTG, though, so probably the biggest issue is just the name. But once there’s some distance and Cyberpunk goes back to being quiet, it’s entirely possible we could assume WotC has lost interest, cut a deal with FFG and arrange for a Hack The Planet LCG to come back.
For my part, as a new player, this timing sucks, but at least there’s a big card pool that I don’t have yet, so I’ll have a lot of stuff to explore for a while.