This, and some sort of different marketing and more relevance

Nintendo just needs stronger hardware (for better graphics) and hardware to sell well.
Once the console is selling better, so will the software.

If you mean recapture the market share of the NES/SNES days then the answer is that they will probably never reach that point again.

Not only is there a lot more competition but that competition is no longer being artificially held down and controlled by Nintendo. Publishers like EA, Activision, Square, and Ubisoft have become forces in their own right. With Playstation, Xbox, and PC all being viable sources of software sales, if anyone tries to hold down third party sales in order to push their own first party offering, suddenly they'll be out in the cold in terms of multi-platform hits, which will in turn limit console units sold.

If you think back on console history, there was a time when EA took a massive risk by refusing to give into Nintendo's conditions for making NES games. That's no longer the case today. No one entity has the kind of power over the market that Nintendo once held.

Third!

Look at the Vita. Uncharted released, so did AC, and COD, and Tales Of, and Little Big Planet, ect, ect, ect. They sold like crap with franchises that usually sell pretty well. 

Sometimes hardware hits software hard, even if the software is popular. 

1. Pokemon X/Y-13.68m
2. Mario Kart 7-11.89m
3. Super Mario 3D Land-10.68m
4. Pokemon OmegaRuby/AlphaSapphire-10.15m
5. New Super Mario Bros. 2-9.61m
6. Animal Crossing: New Leaf-8.8m
7. Super Smash Bros for Nintendo 3DS-7.25m
8. Mario Kart 8-6.74m
9. New Super Mario Bros. U-5.08m
10. Tomodachi Life-4.91m
11. Super Smash Bros. for Wii U-4.84m
12. Luigi's Mansion: Dark Moon-4.49m
13. Nintendo Land-4.39m
14. Splatoon-4.26m
15. Super Mario 3D World-4.11m
16. Legend of Zelda: Ocarina of Time 3D-4.03m
17. Nintendogs + cats-3.74m
18. Legend of Zelda: Link Between Worlds-2.93m
19. Super Mario Maker-2.91m
20. Animal Crossing: Happy Home Designer-2.77m
21. Paper Mario: Sticker Star-2.24m
22. Legend of Zelda: Majora's Mask 3D-2.23m
23. New Super Luigi U -2.22m
24. Mario & Luigi: Dream Team-2.01m
25. Fire Emblem: Awakening-1.92m
26. Donkey Kong Country Returns 3D-1.8m
27. Kirby: Triple Deluxe-1.77m
28. Wii Party U-1.75m
29. Mario Party: Island Tour-1.75m
30. Legend of Zelda: The Wind Waker HD-1.63m
31. Mario Party 10-1.46m
32. Donkey Kong Country: Tropical Freeze-1.39m
33. Yoshi's New Island-1.28m
34. Kid Icarus: Uprising-1.25m
35. Pokemon Mystery Dungeon: Gates to Infinity-1.24m
36. Hyrule Warriors-1.22m
37. Yoshi's Woolly World-1.2m
38. Pokemon Rumble Blast-1.14m
39. Captain Toad: Treasure Tracker-1.13m
40. Pikmin 3-1.03m
41. Fire Emblem Fates-1.00m
42. The Legend of Zelda: Tri Force Heroes-1.00m

Nintendo games are pretty big as is

3D Mario land 3D Zelda are big like ever, just thing is that Wii U is worst selling console in recent years, it has very low user base.

I'd rather their games be good than "big". If the games are good, the "big" will come naturally.

Splatoon isn't really a grounded, realistic experience, with style of art or setting. Bayonetta is pretty different asthetically to God of War, more anime than semi-realistic.

TBH I think if Nintendo made more games like Wave Race, F-Zero, Pilot Wings, Metroid, etc that could be a good move, since they're pretty different from the cartoon like or more niche style games we tend to see on Nintendo's platforms.

Bayonetta wasn't something originated exclusively on a Nintendo platform either, so it going to another platform, exclusively had a negative effect. If Nintendo made something like that or they made a new IP with a 2nd party studio, in a more realistic setting it would fit the bill of what I'm talking about. I think Scalebound, Horizon, The Last of Us, Mirror's Edge, basically all kinds of games like those coming exclusivey to a Nintendo platform would definitely drive the 3rd party audience back to a Nintendo platform.

Nintendo needs to widen their styles. They could even make a realistic racer, like a GT or Forza Horizon.

I haven't seen Nintendo do what I'm talking about. Nintendo could test out the idea of trying this with indie projects, then if those sell well expand sequels into AA or AAA projects.

Thread/ Nobody in their right mind can argue against these numbers, and this is in an underperforming gen. Nintendo never have trouble selling good software numbers.

Koizumi for president Zelda producer!

I would get behind this.