And if the writers of Saban had any brains at all, they could have used this nightmare episode as an opportunity to get Billy to morph into the Blue Ranger again, or do a 1 episode joke thing like they did for Boom in "Boom," only instead of an Orange Zeo ranger, he'd be a Gray Zeo Ranger!
Rule number one about making jokes about Tommy, don't! And second, Zordon didn't pick Tommy, Rita Repulsa did! So don't make jokes about Zordon, make jokes about Rita Repulsa!
It was a dream! 
It didn't HAVE to make any sense! 