This is from a greenspace report released in 2016 by Wakefield Council
"Balne Lane Fields will be enhanced for recreation including a proposal to create sports fields to serve
Wakefield College. A master plan is required for this site."
Obviously this is only my interpretation but I don't see how if it's proposed to be suitable for Wakefield College how it can then be also suitable for a Super League standard stadium. I don't see it as feasible.