The band on Bat Out of Hell is a veritable supergroup, including Todd Rundgren on guitar (who also produced and co-arranged the album), Roy Bittan and Max Weinberg of the E Street Band on piano and drums (both of whom would also return on the following album, Dead Ringer; Weinberg would make it as far as Midnight at the Lost and Found), and Edgar Winter on saxophone.
The title tracks on Dead Ringer and Bad Attitude are duets with Cher and Roger Daltrey respectively.
Bad Attitude featured songwriting and Blind Before I Stop featured vocals from John Parr (the St. Elmo's Fire theme song guy).
Additionally, Blind Before I Stop was produced (and features additional vocals) by Frank Farian, the pop impresario behind Milli Vanilli.
Bat Out of Hell II featured an appearance from Nelson (remember them?) on background vocals, and the return of Todd Rundgren and Roy Bittan.
Welcome to the Neighborhood featured a fairly noteworthy appearance on one track from both Sammy Hagar and Steven Van Zandt of the E Street Band.
One of the new tracks on The Very Best of Meat Loaf featured fellow Steinman collaborator Bonnie Tyler.
Couldn't Have Said it Better, originally planned as a retirement album, featured the obligatory guest appearances from people who had worked with Meat earlier in his career, including Todd Rundgren.
Bat Out of Hell III features guitar work by John 5, Steve Vai, and Brian May, as well as duets with Jennifer Hudson and the aforementioned Marion Raven, to say nothing of the ever-present-on-a-Bat-project Todd Rundgren.
Hell in a Handbasket includes songwriting, production, and rapping by Lil Jon, songwriting and rapping by Chuck D, and vocals from John Rich (replaced on the international versions by Trace Adkins) and Mark McGrath.