Sony just unveiled three awesome new smartphones at IFA last week, but the company may already have plans for its next big thing. A new rumor claims the Japanese giant could announce a super-sized Xperia Z5 Ultra early next year with some pretty crazy hardware.

According to Leaksfly, the Xperia Z5 Ultra will pack a massive 6.44-inch display with a 4K resolution. That makes a lot more sense there than it does on the 5.5-inch Xperia Z5 Premium, but we’re still not sold on 4K smartphones in general. The rumored device could also sport a Snapdragon 820 chip and 4GB of RAM.

Don’t expect the Xperia Z5 Ultra anytime soon, though. The new phablet apparently won’t launch until March 2016, suggesting it could debut at Mobile World Congress in late February. Of course, it’s possible Sony could change its mind long before then and tweak or scrap the device altogether.

In the meantime we’re looking forward to spending more time with the new Xperia Z5 lineup. If Sony does show up with a super-sized Z5 Ultra early next year we’ll be happy to check it out too, though for most people a 6.44-inch smartphone is probably way too big.