Here is a look at the 6 promo stickers available in 2016 Topps Baseball packs:
According to the back, the Baseball Wacky Packages series will be going on sale in March:
Here is a look at the Cubs sticker which is not one of the promos
And here is a link to the flyer.
What a great idea combining two of my favorite collectibles - Wackys and Baseball. I can't wait for these to come out next month!