I didn't see it as taking potshots at TNA.
If I recall (and I might recall incorrectly), Jeff was Brock's first major feud. Showing his final victory in their feud would be a major milestone.
The victory over Hogan was a victory for the "New WWE" over "WWE History".
When Brock first made his appearance in WWE, there was a lot made about the fact that he was a "real wrestler", just like Kurt Angle. The two put on a classic match and ended with a Brock victory. That would again be a major milestone.
It does beg the question of why no footage of the initial WWE title win over the Rock. So, while I don't necessarily think they're taking potshots at TNA, I'll bet there was a little bit of "haha, all these guys are in TNA now" to it.
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