I'm not sure why people are including Royce Lewis in trade scenarios because he supposedly won't be up for 5 years.When a team has really hit on a #1 draft pick (like we're hoping the Twins have), even the high school players reach the big leagues really quick.
Let's look at two recent top draft picks who were infielders drafted out of high school:
Carlos Correa (#1 overall in 2012): 2012 half season: Rk, 2013 season: A, 2014 season A+, 2015: AA/AAA/MLB. MLB debut at age 20.
Manny Machado (#3 overall in 2010): 2010 half season Rk/A-, 2011 season: A/A+, 2012 season: AA/MLB. MLB debut at age 19.
Lewis spit his draft-year season between Rookie and A ball. Putting him on track to reach the majors as early as 2019 or 2020 if all goes to plan. That's right in the middle of the Twins winning window. Of course, plenty could go wrong, but you don't trade a #1 overall draft pick who has Carlos Correa/Manny Machado potential unless he shows you some major flaws.
If I'm the Twins, Lewis is absolutely *untouchable.
*untouchable, of course, qualified to mean any "sane"/realistic trade scenario.