I hope John Manley does not get back into politics. He was never a very bright person to begin with, but never was he leadership material, unless you count being the parties yes man to Chretien as being a quality.
Ignatief was supposedly being groomed for leadership, but I can not see him as being in anyway ready for it. First he needs to do something to prove himself.
McKenna, would definitely be one of the possibilities, but I do not see him as leadership material yet, but it is not that their are many choices.
Stronach, while a new comer, does have some possibilities, but also has many liabilities as well. But if she did give it a go, and she has the money and backing to try. It would be a first for the liberals in having a women as party leader, and that would play well with the voters next time out. But she would really have to take a high profile position on publicly displaying her beliefs, before she would be seriously considered. It will be interesting to watch.