I've already bought my teams set, and put a few bids on some Brewers relics. I tend to like to wait a week or so till the fervor dies down, but I'd see if I can snag a few for cheap early. I haven't noticed anything unexpected, but did find a few cool relics.
The first one is the Indian head pennies. I know coin cards have been done before. But I do so love the odd balls. And these are numbered to just 10.
There is a fairly large checklist for the penny cards.
The other relic I liked is the Stadium seats. I know it's been done before as well, but even as a baseball fan I've all ways loved the ecclectia that get thrown into sets like Allen and Ginter and Goodwin Champions.
MS-MCS Milwaukee County Stadium
MS-SHP Shibe Park
MS-SP Sportsman's Park
MS-TS Tiger Stadium
MS-WF Wrigley Field
I've only seen 3 up on eBay right now, I know it's still early, but looking through brentandbeccas store they only have one up for auction and they break a ton of cases, so these might be quite rare. At only 5 in the set though I can see a few oddball collectors really going for this insert.
That being said enjoy your Gypsy Queen release day.