Hypothetically, Freddy vs Jason gives Doug the excuse to whine about "wah, muh childhood", sequelitis, etc. which is the sorta nostalgia raging he might think his audience wants to hear. (Note: I did not watch the review, but in general Doug tends to cater to other people.)
Which, thinking about this in light of all his Pokemon jokes, is interesting. I mean, yeah, he definitely likes being a contrarian, but Pokemon jokes have an audience. It's just that this audience largely skews older and less nerdy than the average NC viewer. Could Doug be trying to attract a wider demographic? (not just with these jokes, but even in general, maybe)