I'd be surprised if Bresnan wasn't invlolved somewhere in the series: afaics he's improved beyond recognition over the last 18 months. We'll almost certainly need a squad of quicks to see us through 5 tests in less than 2 months, so I'd expect to see various combinations from the six that have been in the frame for this series.
Don't really know about Colly's replacement. At this moment, it's hard to see beyond Morgan, Taylor, Hildreth and maybe Bopara, who'd surely be happier at 6 than where he batted in 2009. Plus his bowling might be a factor.
As for Aus, who knows? I think they'd like Ponting to stay, but not at 3. Whether he fancies being involved in four Ashes losses is debateable though. If he does play, they probably won't want Katich and Hussy as well. tbh I don't know nearly enough about their domestic game to suggest who could come in.