Recently I spent some time looking at Kings/Royals historical numbers, to see if there was a good parallel to Bagley in our past. Although he bore some resemblance to the '94 draft (Brian Grant for most stats, Smith/Funderburke for advanced stats), we were drafting 22-27 year olds who already had most of the skills they'd need. Polish them up as rookies and they'd usually be fine. Grant started 59 games as a rookie, and should have. Looking at more recent examples, he's barely like Cousins and not remotely like Hawes, so I went to bed last night having given up on finding any King to compare his stats to.
I got up this morning and realized that there was one King who had some non-statistical similarity. Both were drafted despite skill gaps, had their BBIQs questioned, and could only play one side of the game very well, but they had great physical tools and potential. I'm looking at Bagley as a rich man's offensive version of Hassan Whiteside. (How rich? I leave that to the reader to sort out.) Unfortunately, this doesn't tell us anything about what to expect. I'm sure he will get treated much better than Whiteside did, and don't anticipate him taking so long, but we've never really developed a raw big before, so... ???