The theme of an 'unlikely partnership' is quite prevalent. Since they are two very different characters from different backgrounds, the idea of them coming together for a common cause, whether it's out of necessity or some other reason, is a popular one in Thanos x Loki fanfiction. Also, the exploration of their individual backstories and how those influence their relationship in the fan - made stories is a common theme.
Betrayal is often explored. Given their characters, it's not surprising that in many fanfictions there are elements of betrayal between Thanos and Loki. For example, Loki might betray Thanos to save himself or the universe. Manipulation is also a big theme. They are both masters of manipulation, and fanfictions play around with how they try to manipulate each other.
Power is a common theme. Both Thanos and Loki are power - hungry in their own ways. In fanfictions, they often either compete for power or try to use each other's power for their own goals. Another theme is redemption. Sometimes Loki is seen as a way for Thanos to find redemption, or vice versa.
Power is a common theme. Thanos is extremely powerful and Loki is always seeking more power, so fanfics often explore how they interact in terms of power - whether it's a power struggle or a shared pursuit of power.
Power is a common theme. Thanos is extremely powerful and Wanda has her chaos magic. Fanfictions often explore how their powers interact or clash. For example, in some stories, Thanos may try to control Wanda's power for his own ends.
Redemption is another theme. Some fanfictions explore the idea of Thanos being redeemed through his relationship with the reader. The reader might see something good in him that others don't, and try to bring out that side. This can lead to some very interesting character development arcs.
A common theme is the clash of ideologies. Thanos with his view of 'balancing the universe' and Tony, the defender of Earth. Their different beliefs often lead to intense confrontations and debates within the fanfictions.
Redemption can also be a theme. Maybe the OC tries to bring out a different side of Thanos, a more humane or less tyrannical side. This often involves a complex relationship development between the two characters in the fanfiction.
I'm not sure specifically about Loki x Thanos mpreg fanfiction. Fanfiction can cover a vast range of pairings and themes, but this particular one might be quite rare or not very mainstream. You could try searching on some large fanfiction platforms like Archive of Our Own to see if there are any works of this kind.
In a Loki x Thanos mpreg fanfiction, a potential plotline could be that the pregnancy is part of a prophecy. Loki and Thanos have to deal with the implications of this prophecy, whether it means the child will bring great power or destruction. There could be a lot of internal struggle for Loki as he contemplates his role as a soon - to - be parent, especially considering Thanos' nature. And Thanos could be using the situation to gain an advantage over his enemies, all while trying to protect Loki and the unborn from those who would oppose them.
Well, perhaps in this fanfiction, Loki is cursed to be attached to Thanos' legs for a period of time. This forces them to work together in a very strange way. Loki tries to use his wits to find a way to break the curse, while Thanos is frustrated by Loki's constant attempts at trickery. Along the way, they might encounter other characters from the Marvel universe who are both amused and confused by their situation.
The theme of discovery is also prevalent. They are from very different worlds, Asgard and Midgard. So, through their relationship, they discover new things about each other's cultures, powers, and personalities. It's like a journey of mutual exploration that makes for really interesting reading.
One common theme is the clash of personalities. Loki is known for his trickery and complex nature, while Brunnhilde is a strong - willed warrior. Their interactions often involve power struggles and trying to understand each other.