The win Aston Villa had against Manchester City and Arsenal has proven them to be a serious Premier League title contender this season.
It's okay to include Aston Villa as a contender for the Premier League title this season because currently Aston Villa's achievements justify your words with the number of points they have pocketed after winning over Arsenal.
If Aston Villa continues playing like this till the end of the season they will qualify for the Uefa Champions League next season.
I think that will happen if throughout this season in every match they are able to maintain their best performance.
Aston Villa's performance is very similar to Newcastle last season, which appeared very dominant, making Newcastle able to compete in the UCL.