According to Rachel Tietz, TMZ really did complain to Doug Walker over comments made about the news network in his recent videos. The TMZ sketch featured in this review was made in response to that.
According to Malcolm Ray, the producers of TMZ became so enraged at what the Nostalgia Critic said about them in his Top 11 South Park (1997) Episodes video that they contacted Blip and made them remove the video from their League of Super Critics YouTube channel (it's still available on TGWTG and Blip), so the extended TMZ spoof in this review was made in response to that.