The WIAA this past summer announced the following proposal to go to 5 divisions in both boys and girls basketball, bumping up private schools one division if they met certain criteria:
http://www.wiaawi.org/index.php?id=427
The criteria that was used would have bumped up Immanuel.
Just recently the WIAA moved ahead to the next step with going to 5 divisions, forming a committee to decide how to accomplish this:
http://www.wissports.net/blog/message.aspx?f=138&id=1098242