My top three would be Blink-182, Linkin Park, and Nirvana...of those, Nirvana's probably the one with the best chance of coming to fruition.
Of bands that deserve a pin...that number is widely variable depending on the criteria for what makes a band deserving of a pin. If it's based on dedicated fanbase, the number is probably wayyyyy higher than eight. If there's a necessary time period for relevance (i.e. a band has been around long enough to have a long-term, dedicated following, the way Aerosmith, Metallica, et al. have) or a genre or some other constriction, the number, naturally, shrinks a bit, but the list would still be pretty long. I get the feeling that bands will be theme fodder for a long time.