I'm sure I could come up with a few ideas, but I will go with the first one I can actually see becoming a real contest in #splinterlands. This is for the 
Title: David vs Goliath (Pink Critter vs Goliath?)
Objective/Goal: Showcase your big win over a much stronger or likely much higher level opponent. Lucky RNG is nice, but tactically outplaying the opponent and shutting down their team is even better.
Rules & Format: Share a battle where your under-leveled or weaker team at first glance manages to pull off the win. Examples include a silver max team taking down a diamond max that is a legit team, a seemingly weak damage team taking down a high attack team because of debuffs to neutralize them, or maybe a very top known leaderboard opponent getting humbled. The enemy does need to appear to be a legit thought out and typically strong enough opponent that just gets beat, a trash team or 1 max summoner and 1-2 max monsters with the rest 1 BCX or bronze level won't cut it.
- To keep it interesting and allow the big guys to submit too, we can also allow the opposite, show how you LOST (with a legit big/strong team) against a little guy who out played you. Will you give in to a little embarrassment for a chance to win a prize?
Judging Criteria: Best/most fun/most interesting little guy victory over a big strong opponent. Dominate slaughter or just sneaking in the win may be weighted differently too.
Why It's Fun/Unique: Let's celebrate the wins for the little guys battling it out above their weight class. Extra strategy is needed to outplay or neutralize your seemingly strong opponent. If their battle history shows a pretty common trend that you can use to your advantage with your much lower level deck to pull off the win, let us see it! If you can put together a strong enough bronze or silver deck team to defeat a respectable enemy 2 leagues above you, showcase your power! Maybe the latest conflict summoners or promo cards can even the playing field and help you take down the higher level opponent that hasn't kept up with the latest cards.
If interested in trying 
https://splinterlands.com?ref=ehmaywuntee