Delay font-lock keyword removal?

[bennofs]

When using js2-mode together with color-identifiers-mode, then there is an ugly flash where every word in the buffer is colored (even in comments) when a new js file is opened. I tracked this down to the use of (setq font-lock-defaults nil) in js2-mode. I think the issue is that this removes all font-lock keywords/comments so color-identifiers-mode thinks that everything is a variable. Is it possible to delay the removal until the initial parsing of the buffer has finished? (so even if it may not be 100% correct, it would be mostly correct until the initial parsing finishes).

Here's how it looks: