I just came across these at Ebay, if anyone is interested.
http://www.ebay.com/itm/Batman-Returns-Press-Kit-1992-Production-Info-Photos-/270913625805?pt=LH_DefaultDomain_0&hash=item3f13b5decd (http://www.ebay.com/itm/Batman-Returns-Press-Kit-1992-Production-Info-Photos-/270913625805?pt=LH_DefaultDomain_0&hash=item3f13b5decd)
http://www.ebay.com/itm/RARE-Original-BATMAN-RETURNS-Deluxe-Movie-PRESS-KIT-Snowy-LOGO-Window-/270899251266?pt=LH_DefaultDomain_2&hash=item3f12da8842
http://www.ebay.com/itm/Rare-Batman-Press-Kit-1989-Michael-Keaton-Jack-Nicholson-Kim-Basinger-/170776252472?pt=LH_DefaultDomain_0&hash=item27c30ed038 (http://www.ebay.com/itm/Rare-Batman-Press-Kit-1989-Michael-Keaton-Jack-Nicholson-Kim-Basinger-/170776252472?pt=LH_DefaultDomain_0&hash=item27c30ed038)
http://www.ebay.com/itm/Rare-Batman-Forever-Press-Kit-1995-Val-Kilmer-Tommy-Lee-Jones-Jim-Carrey-/170771374694?pt=LH_DefaultDomain_0&hash=item27c2c46266
http://www.ebay.com/itm/Batman-and-Robin-Press-Kit-Arnold-Schwarzenegger-George-Clooney-/330686023176?pt=LH_DefaultDomain_0&hash=item4cfe6c4608
http://www.ebay.com/itm/BATMAN-MASK-PHANTASM-MOVIE-PRESS-KIT-PK-687-/360345041439?pt=LH_DefaultDomain_0&hash=item53e63cfa1f