Thomas Cook, like Monarch before them, have no USP and offer nothing that wouldn't be scooped up quickly by others. easyJet and Ryanair tend to beat them on price and frequency and Jet2 have come from relatively nowhere to dominate at former Northern strongholds.
We're closer to the next economic crash than we were when Monarch went to the wall a and no one in their right mind would buy this debt laden business. In terms of long haul, Virgin may well have their eye on some A332s with qualified UK based crews but that's likely the limit of it. You do not need to take on any of the liabilities to take their business if you're ready and waiting the day the business closes.
God that's harsh.......look at Dan Air and BCAL, at least they were folded into a survivor.