He failed to mention which developers he is working with because there is no official Dogecoin team of developers. Maybe he brought in his own team and will fork it.
The idea of fork is nice one. If somehow this fork is real, it would mean all the dogecoin holders will get free fork coin and even if this fork does not happen and Elon continue to promote the original doge, the price will increase in both cases. The only fear is if he stepped out of doge, and then it will collapse badly.