Wales beat Switzerland and Bulgaria in their final two games in Euro 2012 qualifying, although qualification itself was already beyond them.
Ledley, who missed both games with a groin injury, feels manager Gary Speed is getting the best out of his players.
And with flair players such as Gareth Bale and Aaron Ramsey playing a key role in recent games, Ledley believes Wales have everything to look forward to.
Scotland lie in wait in the World Cup campaign along with Croatia, Serbia, Belgium and Macedonia.
Wales are the bottom seeds in the group but they could take points off any team in the section if they continue to improve as in recent games.
Ledley, who missed Scotland's Carling Nations Cup win over Wales in May through injury, said: "I think Gary Speed is a great manager and he's doing things right at international level.
"I think we have got a good future ahead of us. I'm looking forward to playing against Scotland.
"The last time I played against them we had a good victory so hopefully we can do that again."
Ledley sees parallels between the impacts Speed and Scotland boss Craig Levein have had on the morale of their respective squads.
The former Cardiff player said: "Gary has brought in good staff as well, it's not just the manager. It took us a while to get going but I think we found a step up now and we know the formation and our strengths.
"I think Scotland are a great team. "They will be disappointed they didn't qualify but you can see the potential when they play."
Ledley, who hopes to return from injury when Celtic face Kilmarnock at Rugby Park on Saturday, could be lining up alongside another Scotland player in future weeks after Celtic entered the race to sign James McFadden.
Celtic officials are believed to have held talks with McFadden's representatives about a move for the former Motherwell player, who left Birmingham in the summer after missing most of last season with a cruciate ligament injury.
The news comes as a welcome boost for the club ahead of Friday's AGM but McFadden has also received an offer from Wolves and has been linked with Sunderland and former club Everton.
Ledley said: "He's a great player and I think he would be good for the team.
"Obviously it's down to the club to sort it out but we would welcome him to the club.
"I've seen him play for Scotland many times and he's a great player."