Personally i wouldn't mind having Brock back. He is in my book good character when used right playing strong role(especially in early seasons), guiding Ash helping him to grow into better trainer, giving him many useful tips and coming up with strategies for him providing lot of knowledge for group.
He was also like older brother to them, taking care of everyone having his share of moments. Brock is known for being obsessed over girls, shows signs of irrationality when having to deal with finer things in life being very inexperienced in that aspect while at same time being capable, eccentric, collected and mature when it comes to pokemon and bringing order when conflict arises between group giving us often character which had that level of mystery and stability balancing out impulsiveness and tension between cast.
If writers used him properly expanding on that traits they could do something great out of it.
So if writers revamp his role providing justification behind Brock return doing something with him, than yes i would like to see him back. Since his newly found carer of being doctor is unexplored territory it certainly provides material to work upon and do something out of it giving room to Brock character to be fleshed out more.
If i could choose i would rather have Misty or May back instead though having more active dreams.
What? Brock died well before DP; more like somewhere in Johto, just like Misty. All he was was a running gag that mostly stood in the background, and that is true for him for pretty much every series he's been in. I don't care if we ever see him again.
Would you mind explaining?
In Johto we can still see Misty being full of competitive streak, sarcastic comments having tendency to tease Ash and others about their mistakes, we can still see her love for water types and fears, she was still spunky and tomboyish, with character being full of personality. Misty didn't get enough focus for a long saga like Johto was and she suffered from lack of focus but i didn't noticed any decline in character. Only notable change was that she became less violent and more timid,becoming more patient and level headed at end of Johto, being followed with further character growth it in chronicles and Hoenn. Where Misty grew in more selfconfident and mature character while still being quirky and spunky retaining enjoyable traits.
Most fans i met liked way she developed being enjoyable in AG.
As for Brock i agree how DP was lowest point of character starting to lose purpose, but in Hoenn he had pretty good treatment even at later point in Battle Frontier. He got Bonsly,his Mudkip evolved, had some nice moments with May actually interacting with each other as well participating in pokemon contest feeling closer as friends which i cant say for Dawn unfortunately.He also got to battle at Pewter gym, helped Ash, showed his skills as breeder utilizing it on many occasions along with Max idolizing him for his knowledge fulfilling each other nicely. I also find how presence of Max helped his character to have someone to who he could relate to, sharing things in common which allowed for good character play of.
In Hoenn and BF i cant really complain because Brock got pretty good treatment for a sidekick.
p.s.Can't believe it passed so much last time i was here.