(EDIT: The below post is extrapolation based on wins produced numbers for the Timberwolves roster last season. I know some people on this forum have an irrational dislike for advanced metrics. If you are one of them, ignore this post.)
Rubio, Pekovic, and Love alone are worth around 20 wins between them (if you trust advanced metrics ... which you should, but that's a different argument for a different day), assuming all stay healthy and produce at least on the level they did last season. Presumably Rubio and Pekovic will play more minutes than last year, which will up the number of wins to mid 20s for that core.
That's pretty [dang]ed good.
Getting rid of Darko was a great move. He is terrible. Getting rid of Beasley was also a good move. I know people here overrate him, but he is not an efficient player, and all the advanced metrics show that he costs his team wins.
Kirilenko and Roy are both X factors, because it is impossible to predict how well they will play this season. Two or three years ago he was a superstar, but it is unlikely he will play at that level again. Still, if he is only HALF the player he was then, that's worth 6 wins (in his prime he produced ~13 wins ... he won't get more than that, so 6-8 seems about right). The last time Kirilenko played in the league he produced around 8 wins. Since he is old and has been out of the league you expect that to drop, but not by that much, so let's give him 5 wins.
So just this core for next season is getting you at least 35-38 wins, depending on health (especially Roy and Rubio) and minute allocation (we don't know their full roster or situationals yet).
I don't know what the rest of the roster looks like (haven't paid attention), but assuming the rest of the roster is the same as last year, they all produced around 9 wins, give or take.
Add it all up, and advanced metrics predict this team next year should win at least 44-47 games. Not too shabby.