I haven't heard anything. They all come on one sheet..which is attractive.
Stamp collectors often collect First-Day-Issues.....which are envelopes postamrked from the Post Office of origin (for example....a Marin County post office in the case of Star Wars...just what-iffing)) featuring the stamp, and possibly a printed image on teh envelope..or something fancier. I suspect these will exist and will collectible mainly among the phillatellist collectors out there.....not something all SW fans will want to hunt down.
In the past the post office would also put out cheesy collectors items...like mugs..t-shirts....magnets....featuring art from the stamps (almost always also featuring facsimlile of a perforated stamp edge around it...thus making it look like a giant stamp and completely tasteless.
) I don't know if the USPS has done anything like this lately. Typically...if they do put out something nice....it will be very expensive ..and colelctor's item for teh sake of being a collector's item.