Probably not. Brawl isn't quite so complex. I don't see any characters making any drastic jumps or falls in their tier placing.If someone gets to ban all the high tiers for a while, the Low tiers might surpass the Mid or High(some characters have potential)
If you ban the top/high tier characters for an extended period of time, you don't learn how to play against them. You learn how to play low tiers against other low tiers. When those top/high tiers are reintroduced to the metagame, they **** again because people don't know how to play against them. Not productive. It's better to suck it up and just play hard as things stand now. If those low tiers have any potential, it will be discovered by putting them through the crucible of bad match-ups, not by playing them against other characters who suck.