I think so, Matthew Green mentioned that he was planning to implement Zerocoin into its own cryptocurrency. This seems like a reasonable idea me, it lets us test Zerocoin, and if it works well, we can merge it into Bitcoin (without the risk of damaging Bitcoin if something goes wrong).
That's a great idea from a purely technical perspective.
Realize that when money is at stake other factors will come into play.
Zerocoin is a highly desired feature. As soon as they release this coin, it's going to attract investment and it's exchange rate will rise quickly. People are going to put a considerable amount of money into Zerocoin.
When Bitcoin implements these features, it will threaten the value of their investment. Do you think they are going let that happen calmly? They will do everything they can to obstruct the change. They'll come over here and spread FUD, start arguments, and in general make life difficult for any developer seeking to push the change.
This happens already - If you go back to the beginning of this year and read through flamewars regarding scalability and the blocksize and pay attention to the people most fervently opposed to large transaction rates, with the most ridiculous and economically absurd arguments, and then check their posting history you'll find that in almost all cases they were heavily involved with altcoins.