Since the release of Zafaria, there is now 3 open spots located in the world tree where new worlds can emerge.
After reading the forums, Avalon would be a good idea. Lets refine the concept of what Avalon would consist of for a moment. The storyline idea is well written immersing Morganthe with the world of Midevil Times and knights of the round table. In a way, this seems like an upgrade of the Grizzleheim world. Here is some new ideas for a place like that:
Bosses with pets Metal and Machine based enemies Bats, Birds, and Earthworms Add Wizard's School of Automation ( puppets and machines )
I would also like to share my world ideas to fill in the other 2 open spots.
( Atlantia ) world consistent of the elements at war with each other. Morganthe found a way for the schools of magic to begin a feud with each other dividing the lands and creating chaos with each other. She hired elemental bosses to reclaim their territory and target wizards. Here the wizard would be given a chance to battle opposing Elemental Mega-Bosses. And the rarest of items and gear would be found here. New arenas, bosses with 25000 to 50000 health, rank 20, totally epic from each school of magic, and each having pets. This challenge for players would set them to higher goals and confidence. From a mental picture standpoint, it would have boss islands concept.
( insert name here ) world consisting of mystery, darkness, time, and space to detail the epic storyline to explain the ancestory of the schools of magic. Here would be introduced, possibly, wizards of time and space. Who was the teacher of Morganthe and Malistaire and/or the many others? This would include marathon dungeons with many epic levels to solve mysteries, and chances to explore areas well above ground in the sky and space station. Here is some new ideas for a place like this:
Bosses and enemies who copy themselves in battle Phasing enemies who can be attacked only when visible, timed fights Time effecting spells where turns can be skipped Crippling and thieving enemies, dps, stealing blades and/ or shields often Add Wizard's School of Mysticism ( time and space )