If I were a betting man, I would say the ISDS and ICS provisions in CETA are probably dead in Europe for political reasons, not to mention the other hurdles at the European Court of Justice.
At the very least, I think it's highly likely that the current provisions in CETA are going to change, because the Europeans are pushing for a multilateral investment court. They can't approve ICS; or they could, but it would be questionable for them to approve ICS before they know what the multilateral option is going to look like, because they would be undermining themselves.
If anyone tells you the ICS will just be tweaked, I wouldn't put a lot of stock in that myself.
You aren't signing on to a blank cheque, but it's a cheque with very blurry writing on it.