Personally speaking, I'd just take Fisher at his word on this.
If he'd truly welcome an investigation, then why wait?
My biggest concern relates to how the assets in CCFC Ltd seem to have disappeared whilst the debts have increased. If Fisher genuinely wants to allay our fears on that, why not explain in detail how it happened and provide supporting evidence.
Similarly, if he's got evidence of how ACL/Higgs have stitched CCFC up, publish that too.
I'd like to see him challenge for libel too. ACL have clearly and publicly claimed that JS said that there would be no negotiation without freehold. If that's a lie, then challenge it in the courts Mr Fisher. No need to complain about it, challenge it. Let's see who is telling the truth.
I'll say this right now. My opinion of SISU is primarily based on the evidence I've seen which suggests negotiating in bad faith, attempting to distress ACL to pick it up on the cheap, and seemingly moving assets and loading debt to frustrate creditors and prevent purchase by alternative owners.
If Mr Fisher can prove in an open and honest way that I've got it all wrong, then I'll happily admit it. He doesn't have to wait for an investigation to do that - just tell us the facts, and support it with evidence.