FanGraphs Depth Charts has posted these early WAR projections for 2018:
Andrew Benintendi: 2.2 WAR in 150 games
Kyle Schwarber: 1.7 WAR in 100 games
Javier Baez: 1.4 WAR in 111 games
Ian Happ: 1.1 WAR in 147 games
Kris Bryant: 6.1 WAR in 160 games
Mookie Betts: 5.6 WAR in 163? games
http://www.fangraphs.com/statss.aspx?playerid=17901&position=OF
Benintendi had a solid rookie season, ranking seventh among rookie hitters in fWAR, largely on the strength of his extensive playing time:
http://www.fangraphs.com/leaders.aspx?pos=all&stats=bat&lg=all&qual=y&type=8&season=2017&month=0&season1=2017&ind=2&team=&rost=&age=&filter=&players=
Benintendi entered the season ranked first, first and third on prospect lists at Baseball America, MLB.com and Baseball Prospectus, after narrowly maintaining his rookie status with 105 at-bats in 2016. In contrast, Houston infielder Alex Bregman, who is three months older than Benintendi, missed the cut with 201 at-bats in 2016.
Bregman, the No. 2 pick in the 2015 draft, posted 3.8 fWAR and 4.1 bWAR this year while Benintendi, the No. 7 pick in the 2015 draft, posted 2.2 fWAR and 2.6 bWAR this year. Each has five years of team control. FanGraphs Depth Charts projects 2018 WAR of 3.7 for Bregman and 2.2 for Benintendi.
The Cubs may be interested in Benintendi but we don't know how much the Cubs value the 23-year-old outfielder.