Learn Spanish (Latin America): Con esta convicción vamos a triunfar. - With this conviction we are going to triumph.

Triunfar means to triumph or to succeed in a grand, definitive way. While tener éxito is the standard way to say to be successful, triunfar perfectly fits the elevated, passionate tone set by the word convicción.

Could we use the future tense (triunfaremos) instead of vamos a triunfar?

Yes. Triunfaremos (we will triumph) sounds a bit more poetic or formal. However, vamos a triunfar (we are going to triumph) is extremely common in spoken Latin American Spanish, even in passionate declarations, because it makes the future event feel more certain, planned, and immediate.

Since this lesson is about reduplicative subjunctive clauses, how could we attach one to this sentence?

Because this sentence states a strong resolution, it pairs perfectly with phrases expressing indifference to obstacles. You could easily add pase lo que pase (whatever happens) or cueste lo que cueste (whatever it costs) to the end: Con esta convicción vamos a triunfar, pase lo que pase.