Here is a cover I have put together for the sequel to Family Guy: Back to the Multiverse (which I hope FoxNext, Activision and Heavy Iron Studios would officially title Family Guy Multiverse 2: Time, Space and Reality if they officially make it). In addition to Brian, Stewie and Vinny, behind them are New Brian (the Gray Border Collie who intended to replace Brian in Season 7's "The Man with Two Brians") and his younger litter mate sister Ellie (Brian's love interest in Season 16's "Boy (Dog) Meets Girl (Dog)"). The former looks determined for action instead of his usual cheery self, while the latter has a damsel-in-distress look on her face.
Made with Inkscape.
Note: Family Guy is copyright of Seth MacFarlane, FOX and The Walt Disney Company.
Second note: The petition for the sequel is still online at this link.