I agree with @herd_nerfer .
It would be really nice to get some infos. To take the example of old Republic: Sure JKR, Bastilla and Jolee might be relic for many but not everyone has Mission and Zaalbar reliced. If you think about giving them some relics only for the Raid to be quickly gone again, not everyone would do it. That's just one example. It would be the same i every future Raid aswell.
I would be willing to work on those teams on the side but only if I know it is worth it. It would only remain a side project because of course you don't want to drop your main goal for a limited Raid... that would mean you hardly finished the squad for the new Raid and poof, there is a new one and so on. You would never be finished and chase after the new requirements while not being able to pursue your main goal.
Long story short: A little Info would be really helpful.
Edit for typos