I will stop following Sacramento Kings if they sign Teague. Would be so Sacramento-like decision to draft point guard at 5 and another in early 2nd round and then overpaying for an average 29 year old point guard who doesnt fit in our timeline at all.
If the Kings bring in Shelvin Mack or bring back Lawson or Collison and Fox is killing them in training camp and playing how Joerger wants then you start the kid. If he isn't, you have him come off the bench until he is.
The Kings officially started a rebuild when they traded Cousins. And even the best rebuilds (barring a team like the Lakers attracting established stars) takes time. Right now the goal is still collecting assets and helping the young guys develop.