I think part of it's also due to him coming out at a peak time for this kind in terms of popularity. I feel like I hear about this line from way more people than even six months ago and Broly is one of the most current.
Well.... Sdcc vegeta came yesterday. That only leaves vegetto on this list.
I doubt I'll stay completist...mexico goku seems impossible and looking at the upcoming releases, I'm not seeing enough variety to feel I'll be as interested this time next year.... Vegetto, tampoed Goku... God goku... Gold frieza...and another goku with Gohans head... That's this year. And then whatever sdcc brings.