Any ideas for a dnd campaign?

Pretty much what the title says. Looking for ideas i can build into a campaign for my friends.

 nothing too cyber or aetherpunky. Just nice and simple ol' dnd

I think "Lost Mines of Phandelver" is considered a good entry level campaign, levels 1-4

I've played it. I thought it was fun.

LMOP really isn’t my jam. Was hoping for homebrew ideas.

Which setting are you using? Forgotten Realms? Greyhawk? Dragonlance? Homebrew?

"Just nice and simple ol' dnd"

Does this include planar travel? Or do you want to remain in the Material Plane? How about underdark?

And what is the level scope? Starting from level 1 or from a higher level?

Here's a few ideas from the top of my head that could very well fit any setting and level scope.

• The river flowing through a village has been poisoned. The party needs to investigate. The cause could be from a new monster nearby, who settled in recently and is building its lair. Party intervenes either killing the monster, forcing it to leave, or striking a bargain. In any case, from the monster's lair, they find a mysterious item/piece of lore that points them to a bigger adventure.
• A necromancer is causing havoc turning more and more and stronger and stronger creatures undead. They need to be stopped before they wipe out everyone.
• After a millennia of quiet, giants have began to quarrel with each other not respecting their ordning. Something has stirred the lower giants to "rebel" against higher giants.
• A group of scholars did research on Shadowfell aeons ago. They and their work disappeared long ago, but someone became interested and found a bit of their research only to find out the reason the original scholars disappeared was because they discovered a pathway into a new domain of dread and have been lost in the Shadowfell ever since. Now that the Crossing is open again, the party needs to find out the pieces of the scholars' research in order to learn how to close the crossing/prevent the Dark Lord from spreading its power to the Material Plane.