A BEST 2 only included pre-Secret stuff, so if she includes Secret era onwards it'd be even better. A COMPLETE did include Secret, but it's a single best, and ayu includes album tracks on her regular best's, so I think she does a good amount of hits to include
She seems to be reconnecting to her Japanese audience better this year, so if they work on her image (?) well on the next two years, we could have A BEST 3 by her 20th and I'd be pretty much satisfied with it