Remember when gamers found the hidden Arkham Asylum Easter Egg tucked away inside Warden Sharpe's office, that proved Rocksteady had been working on Arkham City all along? Well, we might have another case of just that. Don't get too excited just yet though. After all, Rocksteady made it abundantly clear in the run up to and aftermath of Arkham Knight that they wouldn't be doing another Batman game. Still, given their last cryptic Arkham Insider video, pretty much anything's possible, even if the franchise is bound to live on with or without their expertise at the helm of another project. Back to the Easter Egg though, which finds itself in the self-titled 'Community Challenge Pack' in the Wayne family's humble abode. Players who interact with that famous grand piano are treated to a secret wall of sorts, with all sorts of writings regarding Penguin, what appears to be a murder mystery, and an elusive cell door with the numbers '4.25' scrawled atop it.Whilst these numbers would seem inconsequential to casual Bat-fans, 4.25 actually references the date in which Batman #1 first dropped in 1940. With this in mind, could another Bat-themed announcement be on the way come April? Whether it's Arkham-related or TellTale's latest is anyone's guess, but either way, April just got a whole lot more interesting. Do you think it's plausible Rocksteady are releasing another Arkham title, or does this relate to Telltale's game? Let us know in the comments!