More likely to win a Natty in 2019: Auburn football or Auburn basketball?

Auburn basketball is already the best team in the SEC in 2018, and that's with no seniors. Only 1 player currently playing could potentially not be back next season, that's Mustapha Heron. At best projected at the tail end of the 1st round, I think there is a good chance Heron comes back at least 1 more season.
Austin Wiley has also been ruled eligible for the 2018-19 season. With only half a season of game tape as a green 17 yr old only days removed from HS.

Daniel Purifoy, however, nobody is expecting back. Obviously we don't need him though. But that gives us a scholarship to work with, and it'll likely go to former commit 5* EJ Montgomery, a 7 footer.

So let's review.
Auburn already has the best basketball team in the SEC. Our only weakness is size.
Auburn returns every single player from this season, plus adds TWO 7 foot tall former 5* top 20 overall recruits at Center. Boom, no more weakness.


Auburn Basketball: 2019 National Champs, LOCK



Football, lets all be real here. Auburn returns hands down the best QB in the country, with the best WR group to throw to, and by far the best defense in the country. Alabama is our bitch and UGA is already a pretender and losing their whole defense, and all their offensive skill players so they're no threat.

What I'm saying is what we all already know, whether you can even admit it to yourself or not. Auburn football is going to drag their nuts all over everybody's faces on our way to hoisting that Golden Pussy Playoff Trophy in January, 2019.

Auburn Football: 2019 National Champs, LOCK





tl;dr
The answer to OP is BOTH. Its more likely that Auburn wins the 2019 National Championship games in both football and basketball than any other potential outcome.

2019: Year of the Auburn Tiger