Hi
—- for low budget version suggest…
1 ) shoot cyclist on location as per ref against a clear sky ( as much as possible ) so that the cyclist is essentially in silhouette.
2 ) luma key cyclist and landscape over a still frame of sunset.
3 ) add an animating lens flare to sell the shot.
4 ) if you have any footage of birds that will key maybe add a few as silhouettes as well……..
…………… wont win any prizes but if done thoughtfully with a few tweaks can look very effective.
————– all the best ———chris —