If you said Tennenbaum et al, might resource Advent to buy itself out from Toucan, then I would agree it's a possibility, but not stronger than that.
Advent really doesn't have any intrinsic value yet, other than an agreement with NWBO and a contract with InMune Bio.
It has no licences, no manufacturing plant, and no intellectual property that we know of. LP's MO would suggest she will nurture it for several years until it is really autonomous, then perhaps sell ( when it is worth a big multiple of what it is now.)
JMO.