I will be very surprised to see if DianSheng actually release this before many of their other lower order minx puzzles but they have announced this recently in a somewhat serious capacity. DianSheng were the first to produce a magnetic Gigaminx and a magnetic Teraminx so we would expect them to next release a petaminx and then maybe an examinx and maybe fill the gaps with some even layered minxes like YuXin and ShengShou have been doing recently.

For some reason though, DianSheng have teased a ronnaminx, this goes even beyond the even remotely well known metric prefixes into what was only added two years ago. At the moment, the largest mass produced minx puzzle is a zettaminx (13x13) from ShengShou, if DianSheng is serious about this then they wouldn't just produce the largest mass produced minx puzzle but they would absolutely smash it, I also have no doubt that they would make it magnetic and probably quite expensive.

A ronnaminx would also have 3522 pieces which is 1120 pieces more than the MoYu 21x21 and if DianSheng were to make it magnetic too then it would probably cost even more, I suspect this puzzle would cost around £2000 and would therefore only be bought by a very small amount of cubers, however, if it is released then it would definitely be the most impressive twisty puzzle that is mass produced, it would just make me wonder why they wouldn't go for something easier like a 23x23 which they have teased in the past.

Personally I doubt that DianSheng have any serious plans to release such a puzzle anytime soon but you never know...