It seems the perfect time for him to go, especially with the "last league game at KR" finish.

But that 500 is tantalisingly close...

Indeed

I don't think anyone will think any less of him if he doesn't make it to 500, if it's a big deal to him then by all means but I doubt he would want to go through a full-pre-season for the sake of three or four games.

I think the scenario he has created for himself scoring in the last league with possibly scoring in the last ever game at "Knowsley Road", is a fitting end. His autobiagraphy is going to be one intersting read once published.

He can bow out in the WCC

I think and hope The King will go for another year. He certainly has it in him, as he seems to get better with age.