Hallmark has released a picture of the May the 4th button set for this year. I am sad to find that they aren't itty bittys ones like they have been in the past. There were still plenty of characters for them to do!
To get them, same as in the past, spend $15 or more on qualifying Star Wars items and get the set free with purchase (Limited one per person). Qualifying items vary from store to store, so be sure to ask! They are available in-store ONLY. It appears like they are actually starting to release these early the dates say from 4/26 to 5/4
So far I haven't heard of any itty bittys to be released for the 4th. Hopefully PopMinded tells us different.