Every once in a while someone on a forum half-seriously mentions it... but really it should just be done. Let's have an entire expac based on Bristlebane having fun.
All the new zones could be "Mischiefed" off other great places in Norrath (What if the kobolds took over Paineel, the Gunthak Pirates invaded Qeynos, a raid where your mission is to prank Mata Muram, not kill him, etc.)...
...Think of the idiotic invasions (i.e., level 100 brownies all over Faydwer), the rabbits...
...the goofy firepots, trees and other wierd ports that you have to know to use...
...halflings getting new classes due to the "blessing of Bristlebane"...
...quest arcs involving thieving and sneaking and pranking (oh my!) and goofy illusion items into old-world cities for actual desirable gear...
...crazy cleric (etc.) 2.0...
...and the crowing glory, a dev that "gets it" using the Mac server, emu or whatever source code required (they don't need the code it self really, but they need to login and play it and get the concept again. It was unique...) to create a proper PoM 3.0 that is NOT a grind/kill zone. Make it all about the cards again, with 2 paths of acquisition (raid being efficient and predictable, group/solo being a much longer time sink and/or not quite the same final result).