I don't care for Eberron. That is no big deal, I'll keep playing with the stuff I do like and leave it at that.
However, beyond that I developed a negative attitude towards Eberron because of constant statements from pro-Eberron folks. Statements that negative elements of Eberron don't exist even though they do. And statements that Eberron provides postive elements when it doesn't do so any more than any other setting.
So, from an anti-Eberron person: I hope the market controls what happens. And, barring some internal stupidity on WotC part (possible but not probable) I will get that hope.
It appears that my tiny input to the market is on the minority side. At least for now. The market is what funds the very existance of D&D. For me to hope (much less expect) that WotC would put my preferences ahead of the market's desires would be pathetic.
If the market wants Eberron, the WotC supporting Eberron is what is best for D&D. Therefore, WotC supporting Eberron is what is best for anti-Eberron D&D gamers.
If anyone wants to become their own market by putting up a couple hundred thousand dollars to fund the design of their own personal dream setting, I am certain that WotC or many of the other highly capable designers who frequent these boards would be happy to enter negotiations with you. But, if you prefer to share the funding load with your other gamers, then you are going to have to settle for taking the consensus preference. From there you are free to adapt what you get and make what you want from that.
WotC supporting Eberron is what is best for anti-Eberron D&D gamers.