I think the Hip Hop blogosphere is making more of this than what it actually is.
Jay and the TEAM that pick the artists for performances probably saw the Pop Out Concert viewership, the biggest song of the year, the past highly lauded public performances, the tour grosses, the critical acclaim and the staying power of the catalog and said “Kendrick’s the guy”. Lil Wayne isn’t at the peak of his career anymore but Kendrick is SQUARE within it. I’d bet there was a shortlist of 3-5 acts they were considering and Wayne was nowhere NEAR it. His name probably never came up. Kendrick’s got the culture in the palm of his hand right now, it only makes sense that if your going to go rap, you go Kendrick.
People just ignoring this to run with their Narrative like Kendrick isn't the obvious choice this year of all rap acts.
Regardless of where the SB is being held this is the obvious choice.