One possible theme could be revenge. Since they are enemies, one character might be seeking revenge on the other for something that has happened in the past.
Another theme might be redemption. One of the enemy characters could be on a journey to redeem themselves, either for their actions towards the other character or for something else in their past. This could lead to a change in their relationship and the overall direction of the story.
I'm sorry, I haven't actually watched this 'my enemy telenovela' so I can't tell you the full story.
Family could also be an important theme. There might be family drama, like family members interfering in the main characters' relationship or having their own secrets that affect the overall story.
One possible main theme could be health anxiety. Since it's about a hypochondriac, the character's excessive worry about their health would be a central aspect.
One main theme could be forbidden love. Since it's a secret love, there are likely barriers that make the relationship not publicly acceptable. Another theme might be sacrifice. The lovers may have to sacrifice certain things, like their public image or relationships with others, to keep their love a secret.
Love is likely to be a main theme. In many telenovelas, the journey of the characters towards finding true love is a central plot point. It could also be about family, showing the relationships between different family members, both positive and negative.
Since I don't know the full story, I can't say for sure, but it might include themes of perseverance.
One possible theme could be redemption. If the characters are getting a second chance, they might be trying to make up for past wrongs.
The main themes include love, as Eva Luna's love story is central to the plot. Another theme is social class differences which create many obstacles for the characters. Family also plays an important role, with family secrets and relationships being explored.
Love is likely to be a main theme. Since it's called 'Timeless Love', it probably emphasizes the endurance and constancy of love over time.
Love and betrayal could be main themes. If it's about falling into temptation, there might be a situation where a character betrays their partner's trust due to some form of temptation, like the allure of a new love interest.