Probably not very high. DC is obviously expecting these issues to sell well and any success they have will probably be attributed to Blackest Night. I'd say the only way any of them might get a permanent reboot would be if one sold significantly better than the others. For example if most of the issues sold about 50,000 and Catwoman sold 70,000 issues. I doubt we'll see any permanent continuations, but it is nice to hope.