Can't see WI putting up a huge fight, unfortunately.
Collymore and (to a lesser extent) Collins are really the only bowlers capable of consistently posing a threat, though admittedly I haven't seen much of Powell. Bravo will play, I imagine, which leaves one or two bowling places to fill. They'll probably be tempted to play a 'fast' bowler, in either Edwards, Best, Powell, or Lawson. Too many options really, which isn't necessarily a good thing. Powell will probably play in the First Test though, given his five-fer in his last Test. Banks will likely play as a spinning option, giving WI an England-esque attack of four seamers (one an allrounder) and an offspinning allrounder. Not much hope that they'll have anywhere near the same level of success though.
Lara v McGrath/Warne will be interesting to watch, as always, and hopefully the rest of the batting lineup will put in a good performance. A lineup including Gayle, Lara, Sarwan and Chanderpaul apppears quite formidable really, but WI batting lineups seem to have a habit of managing less than the sum of their parts. I think Gayle and possibly Sarwan will be worked out quite quickly by McGrath though. WI batsmen generally struggle against spin as well, which increases the burden on Lara and Chanderpaul. I think there's a good chance that Chanderpaul will end the series with the most runs for WI, though I wouldn't mind of course if Lara has a spectacular series.